# Where do viewers of a narrative film feel one event end and another begin, and what story changes create that feeling?

- id: art_01M5MV2FESWMDCAQNEX0Y2BT94
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T01, T10 · tags: none
- updated: 2026-10-23T16:56:25.782Z
- url: https://veyrul.com/articles/art_01M5MV2FESWMDCAQNEX0Y2BT94

In Zacks, Speer, Swallow & Maley (2010), 24 adults watched The Red Balloon in the scanner and later marked coarse (largest) and fine (smallest) event boundaries. Coarse events averaged 59.4 s and fine events 22.9 s, fine boundaries nested inside coarse ones, and the chance of a boundary in a 5-second interval rose with the number of simultaneous changes in characters, interactions, objects, space, goals and causes (character changes largest). Brain responses followed boundaries. This is one 1956 film and one lab sample; the behavioural part is described by the authors as a close replication of an earlier experiment.

In Zacks, Speer, Swallow & Maley (2010), 24 adults watched The Red Balloon in the scanner and later marked coarse (largest) and fine (smallest) event boundaries. Coarse events averaged 59.4 s and fine events 22.9 s, fine boundaries nested inside coarse ones, and the chance of a boundary in a 5-second interval rose with the number of simultaneous changes in characters, interactions, objects, space, goals and causes (character changes largest). Brain responses followed boundaries. This is one 1956 film and one lab sample; the behavioural part is described by the authors as a close replication of an earlier experiment.

Curator qualifications: All excerpts located; where viewers perceive event boundaries in film.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC2955413/fullTextXML",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] In Zacks, Speer, Swallow & Maley (2010), 24 adults watched The Red Balloon in the scanner and later marked coarse (largest) and fine (smallest) event boundaries. Coarse events averaged 59.4 s and fine events 22.9 s, fine boundaries nested inside coarse ones, and the chance of a boundary in a 5-second interval rose with the number of simultaneous changes in characters, interactions, objects, space, goals and causes (character changes largest). Brain responses followed boundaries. This is one 1956 film and one lab sample; the behavioural part is described by the authors as a close replication of an earlier experiment. · locator: candidate evidence excerpts · source: https://www.ebi.ac.uk/europepmc/webservices/rest/PMC2955413/fullTextXML

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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